Improvement in carriage-springs



E. P. McCARTHY.

Carriage-Springs.

Patented March 17, 1874.

UNITED STATES PATENT OFFICE.

EDMOND P. MCCARTHY, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN CARRIAGE-SPRINGS.

Specification formirg part of Letters- Patent No. 148,618, dated March17, 1874 application filed September 11, 1873.

To all whom it may concern:

Be it known that I, EDMOND I. MCCAR- THY, of San Francisco city andcounty, State of California, have invented an Improved Spring forRailway-Oars and Vehicles; and I do hereby declare the followingdescription and accompanying drawings are sufficient to enable anyperson skilled in the art or science to which it most nearly appertainsto make and use my said invention or improvement without furtherinvention or experiment.

My invention relates to an improved springbearing for journal-boxes, andit is more especiall y applicable to railway-cars, to which I have shownit as adapted in this case. It consists in the employment of a series ofdouble cu-ps, within which are placed spherical or elliptical rubber orother elastic cushions, which are so combined and arranged that theyreceive all the pressure and also relieve the carriage and running-gearfrom any undue strain from shocks.

- Referring to the accompanying drawings 1' or a more completeexplanation of my invention, Figure l is a perspective view with thefront of the pedestal removed. Fig. 2 is a side elevation of thepedestal, showing the end of the strap.

A is the box, within which the journal B of the axle turns. This boxmoves up and down between the guides G (J of the pedestal-frame I), thispedestal being secured to the carriage. A spring-bearin g strap passesover the box A, and is provided with stout plates or lugs E,whichproject opposite the lower part of the box A at each side, and uponthese plates are secured cups F. Similar cups G are secured directlyabove these cups, and in an inverted position beneath the upper plate Hof the pedestal D.

If it is desired to use my elliptical cushion I, it can be placed withinor between these two cups with its central guiding-rod secured throughtheir centers 5 but if it be found more desirable to employ sphericalcushions, I employ a double cup, J, between the cups F and Gr, one cupof which opens upward, while the other opens downward. The sphericalcushions K and L are inserted so as to be held be tween the cups F J andJ G, respectively.

By employing this form of cushionI am enabled, first, to overcome thetendency of the cushions to crowd out to one side when under pressure;and, secondly, by their spherical shape to secure an evenness of wearupon all sides, as the cushions can be turned about by relieving theweight of the car, and thus perpetually present new surfaces to thecups.

When the carriage is very heavily loaded, it has a tendency to compressthe springs so much that any sudden shock will force the journal-box upagainst the pedestal and break some portion, or otherwise endanger thesafety of the structure. To obviate this, I secure a pair of cups, M andN, one upon the top of the spring-bearing strap above the box A, and theother beneath the top H of the pedestal, as before described, for theother cups, and place a spherical or other shaped cushion, 0, betweenthese cups. This cushion, when employed in connection with the others,serves to receive any sudden shock, and by its elasticity prevent itsbeing communicated too suddenly to the more rigid parts of the carriage.

I make no claim in this application to the elastic cushions K, L, or I,these cushions being in themselves not the invention claimed.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The series of cups F, G, and J, in combination with the elasticcushions K and L, all constructed and applied to a car-pedestal, tooperate substantially as and for the purpose described.

2. The elastic cushion O and cups M N between the box A and plate H, incombination with the elastic cushions K L and cups G J F applied to acar-pedestal, substantially as and for the purpose set forth.

In witness whereof I hereunto set my hand and seal.

EDMOND P. MCCARTHY. [L. s]

Witnesses: 1

JOHN L. Boom, C. M. RICHARDSON.

